A 480 V, 60 Hz, Y connected synchronous generator, having the synchronous reactance of 1 04 ohm and negligible armature resistance, is operating alone The terminal voltage at rated field current at open circuit condition is 480V 1 Calculate the voltage regulation If load current is 100A at 0 8 PF lagging If load current is 100A at 0 8 PF leading If load current is 100A at unity PF 2 Calculate the real and reactive power delivered in each case 3 State and explain whether the voltage regulation will improve or not if the load current is decreased to 50 A from 100 A at 0 8 PF lagging

Question: A 480-V, 60-Hz, Y-connected synchronous generator, having the synchronous reactance of 1.04 ohm and negligible armature resistance, is operating alone. The terminal voltage at rated

A 480-V, 60-Hz, Y-connected synchronous generator, having the synchronous reactance of 1.04 ohm and negligible armature resistance, is operating alone. The terminal voltage at rated field current at open circuit condition is 480V.

1. Calculate the voltage regulation

If load current is 100A at 0.8 PF lagging
If load current is 100A at 0.8 PF leading
If load current is 100A at unity PF

2. Calculate the real and reactive power delivered in each case.

3. State and explain whether the voltage regulation will improve or not if the load current is decreased to 50 A from 100 A at 0.8 PF lagging.

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